index.php -> login.php -> securearea.php
          -> register.php -> index.php

CREATE DATABASE osup
CHARACTER SET 'utf8' 
COLLATE 'utf8_general_ci';

USE osup;

CREATE TABLE users(
	id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
	user VARCHAR(64) NOT NULL UNIQUE,
	pass VARCHAR(64) NOT NULL
);

GRANT INSERT ON osup.users
TO registration_complete@localhost
IDENTIFIED BY "gmfidjhbgifx";


GRANT SELECT ON osup.users
TO login@localhost
IDENTIFIED BY "gfdshnbvcbnvc";


f(x) = x^2

5 -> 25

f(x) = x%10

2
222
112

f(x) = ogifdjsibogfdjnbigtsjnbgitu-sjnbtisjbntirsjbtirsbtr;

DROP TABLE users;

CREATE TABLE users(
	id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
	user VARCHAR(64) NOT NULL UNIQUE,
	pass BINARY(32) NOT NULL
);


DROP TABLE users;

CREATE TABLE users(
	id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
	user VARCHAR(64) NOT NULL UNIQUE,
	pass BINARY(32) NOT NULL,
	salt BINARY(16) NOT NULL
);



UNHEX(SUBSTRING(SHA2(CAST(RAND() AS CHAR),256),1,16))



INSERT INTO users(user, salt, pass) VALUES('ivan', 
UNHEX(SUBSTRING(SHA2(CAST(RAND() AS CHAR),256),1,32)), 
UNHEX(SHA2(
	CONCAT('b4dcf1c06c601a32737106afc30d170b669aa9ea431869a08b184a5f33b2ace9',salt)
	,256)
	));


UNHEX(SHA2(
	CONCAT('b4dcf1c06c601a32737106afc30d170b669aa9ea431869a08b184a5f33b2ace9','gfdsgfs')
	,256)
	)





